CN215104351U

CN215104351U - Novel mao bamboo stake raft roadbed foundation

Info

Publication number: CN215104351U
Application number: CN202122467792.1U
Authority: CN
Inventors: 宋育霖; 孔令臣; 桂建达; 张强; 朱新宇
Original assignee: Tianjin Port Engineering Design & Consulting Co Ltd Of Cccc Frist Harbor Engineering Co ltd
Current assignee: Tianjin Port Engineering Design & Consulting Co Ltd Of Cccc Frist Harbor Engineering Co ltd
Priority date: 2021-10-14
Filing date: 2021-10-14
Publication date: 2021-12-10
Anticipated expiration: 2031-10-14

Abstract

The utility model relates to a novel mao bamboo stake raft roadbed foundation, including the road bed body, still include bamboo raft board, mao bamboo pile foundation, bamboo raft board includes a plurality of bamboo raft piecemeals of tying up together, bamboo raft piecemeal includes a plurality of layers of bamboo raft of tying up together, every layer of bamboo raft includes a plurality of groups vertically and horizontally staggered bamboo bundle one of tying up together, mao bamboo pile foundation includes a plurality of groups bamboo bundle two of ligaturing, inverted geotechnological cloth has been laid at bamboo raft board top, the road bed body is backfilled at inverted geotechnological cloth top, the mao bamboo pile foundation is beaten and is established at bamboo raft board both ends, and its top flushes with bamboo raft board top after the foundation is beaten to the mao bamboo pile foundation, all beat on bamboo raft board and the mao bamboo pile foundation and be equipped with a plurality of plastics drain bar, plastics drain bar squeezes into the foundation. The utility model discloses can reduce engineering cost by a wide margin, construction process is simple, the construction precision is low, and application scope is extensive.

Description

Novel mao bamboo stake raft roadbed foundation

Technical Field

The utility model relates to a road bed construction field especially relates to a novel mao bamboo stake raft road bed basis.

Background

Highway subgrades require that the post-construction settlement of a general section is not more than 30 mm. In soft soil areas, in order to effectively reduce the total settlement of the foundation and control the settlement of the foundation after construction, high-bonding-strength rigid pile composite foundations or pile foundation foundations are often adopted, and the construction cost is high. However, for a short soft soil roadbed, the filling height is smaller than the thickness of the roadbed, the influence of vehicle dynamic load can reach below a pile top cushion layer, and because of the rigidity difference of piles and soil, the adoption of foundation forms such as a pile-net composite foundation and the like can easily generate uneven settlement and accumulated plastic deformation of pile soil to form roadbed diseases, commonly called as a mushroom-type roadbed, and the long-term service performance of the roadbed cannot be ensured. Therefore, a roadbed foundation which is suitable for soft soil areas, meets the settlement requirement and has low construction cost is needed.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the above problem, and provides a novel mao bamboo stake raft roadbed basis.

The utility model discloses a realize above-mentioned purpose, adopt following technical scheme: the utility model provides a novel mao bamboo stake raft roadbed foundation, including the road bed body, still include bamboo raft board, mao bamboo pile foundation, bamboo raft board includes a plurality of bamboo raft piecemeals of tying up together, bamboo raft piecemeal includes a plurality of layers of bamboo raft of tying up together, every layer of bamboo raft includes a plurality of groups vertically and horizontally staggered bamboo bundle one of tying up together, mao bamboo pile foundation includes a plurality of groups bamboo bundle two of ligaturing, inverted filter geotechnological cloth has been laid at bamboo raft board top, the road bed body is backfilled at inverted filter geotechnological cloth top, mao bamboo pile foundation is beaten and is established at bamboo raft board both ends, and its top flushes with bamboo raft board top after the foundation is beaten into to mao bamboo raft board and mao bamboo pile foundation, all beat and be equipped with a plurality of plastics drain bar foundation on bamboo raft board and the bamboo raft pile foundation, plastics drain bar foundation is beaten.

Particularly, the second moso bamboo bundle is formed by binding 7-11 moso bamboos, and the second moso bamboo bundle is cylindrical.

Particularly, the moso bamboo bundle II is bound by a plastic rope.

Particularly, the plastic drainage plate on the moso bamboo pile foundation is fixedly wrapped outside the central bamboo of each moso bamboo bundle II.

Particularly, the moso bamboos on the first moso bamboo bundle are bound in parallel, and the moso bamboos on the first moso bamboo bundle are staggered in a step shape.

Particularly, the adjacent bamboo rows are bound by nylon ropes.

Particularly, when the bamboo raft is bound in blocks, the moso bamboos on the moso bamboo bundles at the adjacent joints are in staggered butt joint binding, and the stagger of the adjacent joints is not less than 1.5 m.

The utility model has the advantages that: the utility model adopts the piled raft foundation formed by the bamboo raft plates and the mao bamboo pile foundation, compared with the traditional roadbed foundation structure, the construction cost can be greatly reduced, the backfill of the roadbed body can be used as an overload material and combined with the preloading process, the soil body strength is greatly increased during construction, and the settlement requirement is met; the method has the advantages of no need of large-scale construction machinery, simple construction process, low construction precision and wide application range, is mainly suitable for soft soil roadbed, can be used for coastal roadbed, is not limited by the construction method for filling the coastal roadbed, can directly carry out land backfill on the first layer, and solves the construction difficulty of carrying out foundation treatment on soft clay.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view showing the positions of the bamboo bundle II and the plastic drainage plate;

FIG. 3 is a schematic structural view of a bamboo bundle II of the present invention;

FIG. 4 is a schematic view of binding a moso bamboo bundle of the present invention;

in the figure: 1-a roadbed body; 2-inverted filtering geotextile; 3-raft board of bamboo raft; 4-plastic drain board; 5-mao bamboo pile foundation; 6-bamboo bundle II; 7-plastic ropes; 8-binding the moso bamboo bundle I;

the following detailed description will be made in conjunction with embodiments of the present invention with reference to the accompanying drawings.

Detailed Description

The invention will be further explained with reference to the following figures and examples:

as shown in fig. 1-4, a novel mao bamboo pile raft foundation comprises a foundation body 1, a bamboo raft plate 3 and a mao bamboo pile foundation 5, wherein the mao bamboo pile foundation 5 comprises a plurality of groups of bound mao bamboo bundles 6, the mao bamboo bundles 6 are formed by binding 7-11 mao bamboos, the mao bamboo bundles 6 are cylindrical, and the mao bamboo bundles 6 are bound by plastic ropes 7; specifically, the diameter of the moso bamboo is about 7-10cm, the length of the moso bamboo is about 8-12m, the plastic ropes 7 are bound at intervals of 1m, and the number of binding passes is not less than 4.

The bamboo raft 3 comprises a plurality of bamboo raft blocks bound together, each bamboo raft block comprises a plurality of layers of bamboo rafts bound together, each layer of bamboo raft comprises a plurality of groups of moso bamboo bundles I8 bound together in a criss-cross manner, moso bamboos on the moso bamboo bundles I8 are bound in parallel, the moso bamboos on the moso bamboo bundles I8 are arranged in a staggered manner in a ladder shape, the moso bamboo rafts on adjacent layers are bound by nylon ropes, when the bamboo raft blocks are bound in blocks, the moso bamboos on the moso bamboo bundles I8 at adjacent joints are bound in a staggered and butt joint manner, and the stagger at the adjacent joints is not less than 1.5 m; specifically, the bamboo raft 3 adopts mao bamboo with the same specification as mao bamboo pile foundation 5, and mao bamboo bundle 8 adopts the iron wire ligature, and iron wire diameter 2mm, nylon rope diameter 8 mm.

Inverted geotechnical cloth 2 has been laid at 3 tops of raft, road bed body 1 backfills at 2 tops of inverted geotechnical cloth, mao bamboo pile foundation 5 is beaten and is established at 3 both ends of raft, and its top flushes with 3 tops of raft after the foundation is beaten into to mao bamboo pile foundation 5, all beat on raft 3 and the mao bamboo pile foundation 5 and be equipped with a plurality of plastics drain bar 4, plastics drain bar 4 squeezes into the foundation, the fixed package of plastics drain bar 4 on the mao bamboo pile foundation 5 is located the center bamboo outside that two 6 were restrainted to every group mao bamboo.

Specifically, after the mao bamboo pile foundation 5 and the bamboo raft 3 are manufactured, the bamboo raft 3 is laid, the bamboo raft 3 laid first can provide a working platform for the subsequent pile-raft foundation erection, the number of layers of the bamboo raft is related to the required rigidity of the bamboo raft, and can be determined through site typical construction;

the mao bamboo pile foundation 5 is positioned through gaps on the bamboo raft 3, the mao bamboo pile foundation 5 can be constructed by adopting an amphibious excavator driving process, a square-arm-driving excavator driving process below 1000 tons, a crane pile sinking process above 1000t and other processes, after the mao bamboo pile foundation 5 is constructed, the top surface of the mao bamboo pile foundation 5 is required to be flush with the top surface of the bamboo raft 3, and the mao bamboo pile foundation 5 are bound together through nylon ropes to form a pile raft foundation, and at the moment, the nodes of the bamboo raft 3 and the mao bamboo pile foundation 5 can be hinged;

after the piled raft foundation is formed, the inverted filter geotextile 2 can be laid so as to facilitate roadbed backfilling and the construction of the plastic drainage plate 4, the lap joint length between the inverted filter geotextile 2 needs to meet the standard requirement and is sewn, and a sand bag can be adopted for temporary pressure protection during the laying;

the plastic drainage plates 4 on the mao bamboo pile foundations 5 are synchronously arranged in the foundation along with the arrangement of the mao bamboo pile foundations 5, the plastic drainage plates 4 on the bamboo raft rafts 3 are arranged in the foundation through gaps on the bamboo raft rafts 3, the roadbed body 1 can adopt a land backfill or water blow-fill scheme, the comprehensive consideration of filler resources, foundation treatment requirements and construction organization is combined, the rigidity of the pile raft foundation can meet the load requirements of construction machinery, and if the roadbed is a coastal roadbed, fishing boat inlet and outlet spaces for transporting materials need to be reserved in a sea area.

The utility model discloses compare with traditional roadbed foundation structure, can reduce engineering cost by a wide margin, soil body intensity increases by a wide margin during the construction, satisfies the settlement requirement, need not large-scale construction machinery, and construction process is simple, the construction precision is low, and application scope is extensive.

The present invention has been described above with reference to the accompanying drawings, and it is obvious that the present invention is not limited by the above embodiments, and various improvements made by the method concept and technical solution of the present invention or directly applied to other occasions without improvement are all within the protection scope of the present invention.

Claims

1. A novel mao bamboo pile raft roadbed foundation comprises a roadbed body (1), and is characterized by further comprising bamboo raft plates (3) and mao bamboo pile foundations (5), wherein the bamboo raft plates (3) comprise a plurality of bamboo raft blocks bound together, the bamboo raft blocks comprise a plurality of bamboo raft layers bound together, each bamboo raft layer comprises a plurality of groups of mao bamboo bundle I (8) bound together in a criss-cross manner, the mao bamboo pile foundations (5) comprise a plurality of groups of bound mao bamboo bundle II (6), inverted filter geotextile (2) is laid on the top of each bamboo raft plate (3), the roadbed body (1) is backfilled at the top of the inverted filter geotextile (2), the mao bamboo pile foundations (5) are arranged at two ends of each bamboo raft plate (3), the mao bamboo pile foundations (5) are arranged in a foundation, the tops of the mao bamboo raft plates (3) are flush with the tops of the bamboo raft plates (3), a plurality of plastic drainage plates (4) are arranged on the bamboo raft plates (3) and the mao bamboo piles (5), the plastic drainage plate (4) is driven into the foundation.

2. The novel bamboo pile raft roadbed foundation as claimed in claim 1, wherein the second bamboo bundle (6) is formed by binding 7-11 bamboos, and the second bamboo bundle (6) is cylindrical.

3. A novel bamboo pile raft foundation according to claim 2, wherein the second bamboo bundle (6) is bound by plastic ropes (7).

4. A novel mao bamboo pile raft roadbed foundation according to claim 3, wherein the plastic drainage plates (4) on the mao bamboo pile foundations (5) are fixedly wrapped on the outer sides of the central bamboos of each group of mao bamboo bundles two (6).

5. A novel mao bamboo pile raft roadbed foundation according to claim 4, wherein the mao bamboos on the mao bamboo bundle I (8) are bound in parallel, and the mao bamboos on the mao bamboo bundle I (8) are staggered in a step shape.

6. The novel bamboo pile raft roadbed foundation of claim 5, wherein the bamboo rows in adjacent layers are bound by nylon ropes.

7. A novel mao bamboo pile raft roadbed foundation as claimed in claim 6, wherein when the bamboo raft is bound in blocks, the mao bamboos on the mao bamboo bundle I (8) at adjacent joints are staggered, butted and bound, and the stagger at the adjacent joints is not less than 1.5 m.